Envelop.



PATENTED JUNE 20, 1905.

A. DE SAINT OHAMAS.

ENVELOP.

APPLIOATION FILED SEPT. s, 1904.

NITED STATES Patented June 20, 1905.

ALBERT DE SAINT CHAMAS, OF CHICAGO, ILLINOIS.

ENVELOP- SPECIFICATION forming part of Letters Patent No. 792,668, datedJune 20, 1905.

Application filed September 6, 1904. Serial No. 223,438.

. To all whom/ it may concern.-

Be it known that I, ALBERT DE SAINT CHA- MAS, a citizen of the UnitedStates of America; and a resident of Chicago, in the county of Cook andState of Illinois, have invented certain new and useful Improvements inEnvelops, of which the following is a specification.

The main objects of my invention are to provide, in an envelop which isadapted for securely retaining its contents and at the same timepermitting of being readily opened for inspection, an improved form offlap-retaining pocket and an improved arrangement of the flap, wherebythe same may be readily inserted or withdrawn from the pocket. Iaccomplish these objects by the device shown in the accompanyingdrawings, in which Figure 1 is a plan showinga form of blank for makingenvelops embodying my invention. Fig. 2 shows the same blank after ithas been folded to form the flap-retaining pocket and showing one of theside flaps in its closed position and the other flap at right angles tothe body part of the envelop to illustrate the method of folding theblank. Fig. 3 is a view of the completed envelop. Fig. 4 illustrates theenvelop with its upper flap in its closed position. Fig. 5 is a sectionon the line 5 5 of Fig. .4, the thickness of the material beingexaggerated for the purpose of clearness.

In the form shown the blank 1 is cut away at its corners and creased toform a rectangular body part 2, having rectangular side flaps 3 and 4 ofthe same length as the body part 2 and of sufficient width to overlapwhen folded against the body part on the lines 6 and 7 The envelop isalso provided with a bottom flap 8, which is gumrned for being securedagainst the closed side flaps, and a top flap 9, which is not gummed.The body part 2 together with the side flaps 3 and 4 are creased on thelines 10 and 11, which are below the upper edge 12 of the body part anddisposed in parallel relation to the same. The top flap 9 is creased inopposite directions on the lines 13 and let, and the side flaps arenotched at 15 and 16 for the purpose which will be hereinafterexplained.

To form the envelop, the blank shown in Fig.

1 is folded back upon itself on the crease 11 and is then folded forwardon the crease 10, bringing the creases 11 and 12 into adjacentpositions, and thereby shortening the length of the body part 2. Theside flaps are then turned down against the body part 2 and securedtogether with their respective folds registering with each other. Thenotches 15 and 16 permit the folds of one of the side flaps to bereadily inserted into their proper registering position with thecorresponding folds of the other side flap. When the side flaps are thussecured together and the bottom flap 8 secured in its closed position,then the envelop is complete and appears as illustrated in Fig. 3. Thepart of the blank which lies between the creases 11 and 12 now forms astrip extending entirely around the upper edge of the envelop andforming a pocket opening outwardly and downwardly away from said upperedge.

The feature of forming a flap-retaining pocket along the open edge ofthe envelop is not broadly claimed herein, but is more fully describedand claimed in my copending applications, Serial No. 219,082, filedAugust 1, 1904, and Serial N o. 222,29 I, filed August 26, 1904:.

To close the envelop, the flap 9 is closed by folding the same on thecrease 12 and then tucking a fold of the flap 9 into the pocket, asshown in Fig. 5, causing the flap 9 to fold in opposite directions onthe creases 13 and 14:, with its free end 17 extending outwardly of thepocket, so as to be conveniently grasped by the user of the envelop forwithdrawing the flap from the pocket and opening the envelop.

It will be seen that some of the details of the device shown may bealtered without departing from the spirit of my invention.

WhatI claim as my invention, and desire to secure by Letters Patent, is-

1. As an article of manufacture, an envelop comprising a blank cut toform a rectangular body part, having flaps at opposite sides thereof,said blank being folded upon itself across the body part and the sideflaps on two lines substantiallyparallel with the upper edge of the bodypart to forma pocket below said upper edge and opening outwardly anddown wardly, and the side flaps being then closed and secured againstthe body part and serving to prevent the unfolding of said pocket,substantially as described.

2.- As an article of manufacture, an envelop having near its flap edge apocket opening outwardly and facing away from the flap and adapted toreceive the flap when closed and folded back into the pocket, and theflap being creased on opposite sides on two lines substantially paralleland non-coincid ent with the top of the body part to form a fold adaptedto be tucked into the pocket when the flap is closed,and said flap beingof sufficient length to have its free end extending outwardly of thepocket, substantially as described.

3. As an article of manufacture, an envelop comprising a blank cut toform a rectangular body part having a top flap and two side flaps, saidside flaps being of suflicient length to overlap when folded against thebody part and their upper edges terminating substantially in alinementwith the top of the body part, said blank being then folded upon itselfacross the body part and the side flaps on lines substantially parallelwith top of the body part to form a pocket opening outwardly anddownwardly, and the side flaps being then closed against the body partand secured together with their corresponding folds registering witheach other, substantially as described.

4:. An envelopblank, comprising a rectanthe top edges of the side flapsbeing substantially in alinement with the top of the body part and theside flaps being adapted to overlap each other when folded against thebody part, the body part and side flaps having therein the creases and11 in opposite faces of the blank and parallel with the top of the bodypart, and the top flap having the creases 13 and 14 in opposite facesthereof, also parallel with the top of the body part, and spaced tocorrespond with the creases 10 and 11, substantially as described.

5. An envelop-blank, comprising a rectangular body part, having a topflap at one end of the same and a flap at each side of the same, the topedges of the side flaps being substantially in alinement with the'top ofthe body part and the side flaps being adapted to overlap each otherwhen folded against the body part, the body part and side flaps havingtherein the creases 10 and 11 in opposite faces of the blank, andparallel with the top of the body part, the side flaps being notched at15 and 16 at respectively opposite ends of the creases 10 and 11, andsaid notches extending inward a distance substantially equal to theoverlap between said side flaps when closed, substantially as described.

Signed at Chicago this 2d day of September,

ALBERT DE SAINT GHAMAS.

Witnesses:

GLEN C. STEPHENS, EUGENE A. RUMMLER.

